diff --git a/src/content/3.2/Adjunctions.tex b/src/content/3.2/Adjunctions.tex
index 03b7def..07b0046 100644
--- a/src/content/3.2/Adjunctions.tex
+++ b/src/content/3.2/Adjunctions.tex
@@ -179,7 +179,7 @@ transformations, and their composition is the horizontal composition of
 natural transformations. In components, these identities become:
 \begin{gather*}
 \varepsilon_{L d} \circ L \eta_d = \id_{L d} \\
-R \varepsilon_c \circ \eta_{R c} = \id_{R c}
+R \varepsilon_{c'} \circ \eta_{R c} = \id_{R c}
 \end{gather*}
 We often see unit and counit in Haskell under different names. Unit is
 known as \code{return} (or \code{pure}, in the definition of